Are salted eggs nutritious?

Salted eggs and fresh eggs contain completely different nutrients, because salted eggs are preserved for a period of time. Some nutrients in it have changed obviously. For example, the content of protein in eggs will be significantly reduced, and the content of fat will be significantly increased. However, minerals and calcium are well preserved, and the lid inside the salted egg will be greatly improved, so there are still some nutrients in the salted egg. However, because salted eggs are too salty to eat, pickled food contains some nitrite, which will cause certain side effects to the body if eaten too much.